<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        body {
            margin: 0px;
            padding: 0px;
        }
    </style>
</head>
<body>
    <div style="width: 1200px; margin-left: auto; margin-right: auto;">
        <!-- loading:lazy 解决新版chrome和firefox不支持iframe问题 -->
        <iframe name="main_top" src="top.html" loading="lazy" frameborder="0" width="1200" height="100" scrolling="no" style="display: block;"></iframe>
        <iframe name="main_left" src="left.html" loading="lazy" frameborder="0" width="182" height="700" scrolling="no" style="float: left;"></iframe>
        <iframe name="main_right" src="index.html" loading="lazy" frameborder="0" width="1018" height="700" scrolling="no" style="float:left;"></iframe>
    </div>
</body>
</html>